Backgroundrb devel - Oct 2006 - accessing session data in worker

Is there something special I need to do to access session data in a worker?  

I''m using an AR session store.  I''ve been working with
Ezra''s tutorial, modifying it a little here and there to figure it out.
So I changed the progress bar to a simple count-down in the worker which sends
back the count to display in the view.  No big deal.  But if I try to access
session data in the worker method, I get no count displayed in the view.

Any ideas?

Thanks,
Bill

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Do you have a code snippet to show?  The Session model should be availible
if you are loading rails.

On 10/16/06, Bill Walton <bill.walton at charter.net>
wrote:
>
>  Is there something special I need to do to access session data in a
> worker?
>
> I''m using an AR session store.  I''ve been working with
Ezra''s tutorial,
> modifying it a little here and there to figure it out.  So I changed the
> progress bar to a simple count-down in the worker which sends back the
count
> to display in the view.  No big deal.  But if I try to access session data
> in the worker method, I get no count displayed in the view.
>
> Any ideas?
>
> Thanks,
> Bill
>
>
>
> _______________________________________________
> Backgroundrb-devel mailing list
> Backgroundrb-devel at rubyforge.org
> http://rubyforge.org/mailman/listinfo/backgroundrb-devel
>
>
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On Oct 16, 2006, at 2:55 PM, Bill Walton wrote:
> Is there something special I need to do to access session data in a  
> worker?
>
> I''m using an AR session store.  I''ve been working with
Ezra''s
> tutorial, modifying it a little here and there to figure it out.   
> So I changed the progress bar to a simple count-down in the worker  
> which sends back the count to display in the view.  No big deal.   
> But if I try to access session data in the worker method, I get no  
> count displayed in the view.
>
> Any ideas?
>
> Thanks,
> Bill
>
>
> _______________________________________________
> Backgroundrb-devel mailing list
> Backgroundrb-devel at rubyforge.org
> http://rubyforge.org/mailman/listinfo/backgroundrb-devel

	The session is not available in the workers. If you need a value  
from the session then you must pass it into the new_worker call  
ass :args

Cheers-

-- Ezra Zygmuntowicz 
-- Lead Rails Architect
-- ez at engineyard.com
-- Engine Yard, Serious Rails Hosting
-- Reliability, Ease of Use, Scalability
-- (866) 518-YARD (9273)

Hi Ezra,

Ezra Zygmuntowicz wrote:
> The session is not available in the workers.
Thanks for clearing that up for me!  So the data ''inside'' the
session record
is not available, but the session record IS?  I''m using BackgroundRB to
do
session cleanup for abandoned sessions.  I''m thinking that I can pass
the
session id to the worker and then, inside the worker, retrieve and delete 
that record with something like

session_record = Session.find(:first, :conditions => ["sessid = ?",
passed_in_session_id])
session_record.destroy

Is that right?  Or do I need to do something special to access that record?

Thanks,
Bill

I was accessing the Session model directly from within a worker and it was
working:

class ClearSessionsWorker < BackgrounDRb::Rails

  repeat_every 7.minutes
  first_run Time.now

  def do_work(args)
    Session.destroy_all(["updated_at < ?", 20.minute.ago ])

    ::BackgrounDRb::MiddleMan.instance.delete_worker @_job_key
  end
end

I just wasn''t cleaning the workers up properly, but it was cleaning out
sessions as it should...


On 10/17/06, Bill Walton <bill.walton at charter.net>
wrote:
>
> Hi Ezra,
>
> Ezra Zygmuntowicz wrote:
>
> > The session is not available in the workers.
>
> Thanks for clearing that up for me!  So the data ''inside''
the session
> record
> is not available, but the session record IS?  I''m using
BackgroundRB to do
> session cleanup for abandoned sessions.  I''m thinking that I can
pass the
> session id to the worker and then, inside the worker, retrieve and delete
> that record with something like
>
> session_record = Session.find(:first, :conditions => ["sessid =
?",
> passed_in_session_id])
> session_record.destroy
>
> Is that right?  Or do I need to do something special to access that
> record?
>
> Thanks,
> Bill
> _______________________________________________
> Backgroundrb-devel mailing list
> Backgroundrb-devel at rubyforge.org
> http://rubyforge.org/mailman/listinfo/backgroundrb-devel
>
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Hi Michael,

Michael D''Auria wrote:
> I was accessing the Session model directly
> from within a worker and it was working:
I don''t seem to be able to access my models at all.   I''ve got
two AR models
in this little sandbox app: Session and Emrec.  I thought I''d start
with the
Emrec model (haven''t tried to access the Session model yet).  In the 
controller, before starting up the worker, I create an Emrec.  In the 
worker, I want to delete it.  I was trying to pass in the id of the record I 
want but couldn''t get that to work.  I figured it was a problem with
how I
was trying to access the record id, so I tried to hardcode the delete.  My 
worker looks like...

-----------  worker ---------
class FooWorker < BackgrounDRb::Rails
  attr_reader :time_remaining

  def do_work(args)
    @time_remaining = 7
    calculate_the_meaning_of_life(args)
  end

  def calculate_the_meaning_of_life(args)
    while @time_remaining > 0
      # calculations here
      @time_remaining -= 1
      sleep(1)
    end
    Emrec.delete(1)
  end
end
--------- end of worker ---------

The emrec is not getting deleted.  Any idea what I''m doing wrong here?

Also, assuming I get the hardcoded version working, what''s the syntax
for
accessing the values passed in the args hash?

Thanks,
Bill

Ahh ok I misunderstood you then. I thought you were trying to use  
session[:foo] from within a worker my bad.

-Ezra



On Oct 17, 2006, at 7:42 AM, Michael D''Auria wrote:
> I was accessing the Session model directly from within a worker and  
> it was working:
>
> class ClearSessionsWorker < BackgrounDRb::Rails
>
>   repeat_every 7.minutes
>   first_run Time.now
>
>   def do_work(args)
>     Session.destroy_all(["updated_at < ?", 20.minute.ago ])
>
>     ::BackgrounDRb::MiddleMan.instance.delete_worker @_job_key
>   end
> end
>
> I just wasn''t cleaning the workers up properly, but it was
cleaning
> out sessions as it should...
>
>
> On 10/17/06, Bill Walton <bill.walton at charter.net> wrote: Hi Ezra,
>
> Ezra Zygmuntowicz wrote:
>
> > The session is not available in the workers.
>
> Thanks for clearing that up for me!  So the data ''inside''
the
> session record
> is not available, but the session record IS?  I''m using  
> BackgroundRB to do
> session cleanup for abandoned sessions.  I''m thinking that I can  
> pass the
> session id to the worker and then, inside the worker, retrieve and  
> delete
> that record with something like
>
> session_record = Session.find(:first, :conditions => ["sessid =
?",
> passed_in_session_id])
> session_record.destroy
>
> Is that right?  Or do I need to do something special to access that  
> record?
>
> Thanks,
> Bill
> _______________________________________________
> Backgroundrb-devel mailing list
> Backgroundrb-devel at rubyforge.org
> http://rubyforge.org/mailman/listinfo/backgroundrb-devel
>
> _______________________________________________
> Backgroundrb-devel mailing list
> Backgroundrb-devel at rubyforge.org
> http://rubyforge.org/mailman/listinfo/backgroundrb-devel
-- Ezra Zygmuntowicz 
-- Lead Rails Evangelist
-- ez at engineyard.com
-- Engine Yard, Serious Rails Hosting
-- (866) 518-YARD (9273)